﻿/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

namespace NMigrations
{
    /// <summary>
    /// Enumerates possibilities for the propagation of
    /// foreign key changes in DELETE or UPDATE statements.
    /// </summary>
    public enum ForeignKeyConstraintPropagation
    {
        /// <summary>
        /// DELETEs/UPDATEs are not possible.
        /// </summary>
        Restricted,

        /// <summary>
        /// DELETEs/UPDATEs are cascaded to the related tables.
        /// </summary>
        Cascaded,

        /// <summary>
        /// Related columns are nulliefied on DELETEs/UPDATEs.
        /// </summary>
        Nullified
    }
}